Hello, welcome to JustAnswer, my name isXXXXX you for this opportunity to answer your questions.
they are asking for several additional evidence: itinerary of my travels(can it be letter from me about my travels+tickets and pictures?); the place where I was living during B2 visa;
The CIS is looking for evidence to establish that you did not enter the US intending to become a student. They consider it misrepresentation of the purpose of your entry when you were questioned by the inspector at the port of entry. They asked you what you plan on doing when you are in the US and you would have answered something about your tourist intent.
That is why they want to see an itinerary of your travels, including such things as plane tickets, train tickets, admission tickets to tourist sites, etc.
Therefore, submitting tickets and date stamped photos will help you establish the fact you did not lie or misrepresent your intent to be a tourist when you entered on the B2 tourist visa.
the statement addressing the efect of extendet stay in US on my residence abroad(what that should be?);
When you applied for your tourist visa you had to show evidence of your intent to return.
You would have told the consul that you had certain compelling ties such as family, school, a residence, and/or employment in a good job that you have held for a period of time.
The CIS is asking you to explain how it is that you had these compelling ties to return to in Ukraine but now they are not drawing you back there.
So they want to know how it is that you would then have the intent to return to Ukraine after you go to school because you said you would return after your tourist visit and then didn't go back home but instead applied to school
statement of explanation/intentions pertaining to my request for F1, and intentions after i complete the program.
Again, the CIS wants you to explain how you will be drawn back to Ukraine after you finish school. How finishing school here in the US will give you an advantage on the job or in your studies you would continue in Ukraine after you finish your US program. You will have to explain to CIS your intent to return and have them believe you just as the consul believed you when you had your visa interview.
I am happy to answer follow-up questions for you at no additional cost.
If you want to request me in the future start your question "FOR JUDITH" and I will answer quickly.